Soap



a the mercuric salt Patented et; 15, 1929 *nrr'sn era.

PAUL E. TODD,

oar-a res New @FFWE or namrrazoo, mcnronn.

ESQJAP lilo Drawing.

This invention relatesto germicidalsoap. The ob ect of this invention is to proyide an improvement in germicidal soaps, particularlyin mercuric germicidal soaps. is a particular object to increase the germicidal quality and modify the harshness of such soap. v 1 vlileretofore, an efiective germicidal soap has been prepared by incorporating about it) two per cent of a mercuric salt, for-example mercuric iodide,-. in a good ordinary toilet soap base. Such asoap, though strongly germicidal, is harsh'in its eflect upon the skin owing l have found that by using a mercuric salt in conjunction with cresol in soap, it is .possible to obtain a soap with a high degree of 'efficiency as a germicide, but with a consider- 2 ably milder action upon the skin, this latter quality being-evidently due to the greater efiectiveness of mercuric salts when used in conjunction with cresol,

to use a considerably smaller percentage of and still obtain a soap wit t potassium iodide in parts of to the corrosive actlon of the '15 combmed mercury.

making it possible Application filed an 25, 1927. Serial No. 19433;.

,the saponification is completed." I then crutch 10.3 parts of mercuric iodide in a solution prepared by dissolving .8, parts of water. I then crutch the same after'heating to a boil- 55v ing point into the sea togetherwith 103 parts cresol, U. S. P. A ter thorough crutching the hot soapds poured into a small soap cooled and cut up ready PAUL n. om).

a high germicidalefliciency. There'is what might be called a synergetic relation between the germicidal actions of soluble mercuric salts and cresol. I

l have found, for example, that a good orbase made from 'cocoanut an dinary' soap the proportion of two-parts by oliveoils, in

weight of properly saponified with caustic soda, and impregnated with one per cent of mercuric chloride'and ten per cent Staphylococcus awrcm and Bacillus coll within five minutes at 20 C. in an eight per cent solution, that is, when the organisms 40 are immersed for fiveminutes in a solution of eight grams of the soap in ninety-two grams of water. 4

In pre aring my soap, ample ta en by weight400 parts of cochm cocoanut oil and 200 parts of olive oil and saponified'the mixedoils with 106 parts-of caustic soda dissolved in 214 tilled water, stirring the alkali into the oils and crutching until saponification was well underway. I" then beat the mixture until of cresol, kills I have as an exolive oil to four ofcecoanut oil,

parts of dis- 

